CVE-2026-102551

Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling

Published Oct 16, 2026 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
Description
Improper verification of the source of a communication channel in the IPv6 Router Advertisement handler in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow a remote third-party to influence an endpoint's IPv6 default gateway, on-link prefix, and address configuration via a crafted Router Advertisement.



To remediate this issue, users should upgrade to version V4.4.2.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper verification of the source of a communication channel in the IPv6 Router Advertisement handler in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow a remote third-party to influence an endpoint's IPv6 default gateway, on-link prefix, and address configuration via a crafted Router Advertisement. To remediate this issue, users should upgrade to version V4.4.2.
Title Improper verification of the source of a communication channel in FreeRTOS-Plus-TCP Router Advertisement handling
First Time appeared Freertos
Freertos freertos-plus-tcp
Weaknesses CWE-940
CPEs cpe:2.3:a:freertos:freertos-plus-tcp:*:*:*:*:*:*:*:*
Vendors & Products Freertos
Freertos freertos-plus-tcp
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Oct 19, 2026, 12:51 PM
Reserved
Sep 29, 2026, 1:04 PM
Status
Awaiting Analysis
Published
Oct 16, 2026, 6:17 PM
Modified
Oct 19, 2026, 1:16 PM